#!/usr/bin/python3
# -*- coding: UTF-8 -*-

def toCamelCase(s: str) -> str:
    parts = s.split('_')
    return ''.join(part.capitalize() for part in parts)

def lowercaseFirstLetter(s:str) -> str:
    if not s:
        return s  # 处理空字符串情况
    return s[0].lower() + s[1:]

def binaryToHex(binary_str):
    decimal_value = int(binary_str, 2)
    hex_value = hex(decimal_value)
    return hex_value


if __name__ == "__main__" :
    # 0xff00000000
    print(binaryToHex("0b1111111100000000000000000000000000000000"))